Rivet stem puller and cutter



yc3. R. BUCHET 2,438,201

RIVET STEM FULLER AND CUTTER Filed June 23, 1944 2 'Sheets-Sheet l March 23, 194s.

ATro/yEY March 23, 1948. c. R. BucHET v 2,438,201

RI'VET ST'EM-PULLR AND CUTTER Filed June 25, 1944 2 Sheets-Sheet 2 "l lllllll 'llllllml'l Y v :f

l --Iumlllllp m Il'pllpr C'. R. UCHET ATTORNEY ,34" INVENTOR.

Patented Mar. 23, 1948 RIVET STEM FULLER AND CUTTER Conrad R. Buchet, Pasadena, Calif., assgnor of three-fourths to B. F. B. Engineers, Incorporated, a corporation of California, and one-4 fourth to Milton H. Lees, Jr.

Application June 23, 1944, Serlal No. 541,698

s claims. l

This invention relates t a rivet chuck and cutter.

The general object of the invention is to provide an implement for working a rivet, particularly of the mandrel extrusion type, wherein a shank ts in a tubular headed member and is pulled into place during the fitting of the rivet, and my invention aims to provide compact, elcient, reliable means for performing the necessary functions.

A further object of the invention is to provide a novel cutter particularly adapted to cut oi the shank of a rivet.

A further object of the invention is to provide a novel chuck or gripping member for engaging the shank of a rivet, l

A further object of the invention is to provide a novel chuck which is designed to engage and pull the shank of a rivet.

An additional object of the invention is to provide a novel combined chuck and cutter adapted to be used in fitting a rivet.

Other objects and advantages of my invention will .be apparent from the following description taken in connection with the accompanying drawings, wherein:

Fig. 1 is a side elevation showing a chuck and cutter embodying the features of my invention;

Fig. 2 is a central, longitudinal, enlarged, sectional view showing the jaw and cutter members and operating parts thereof;

Fig. 3 is a view similar to Fig, 2, showing the parts in another position;

Fig. 4. is a top plan view of the chuck and cutter taken on line 4-4, Fig. 2;

Fig. 5 is a bottom plan view of the chuck and cutter taken on line 5 5, Fig. 2;

Fig. 6 is an enlarged section taken on line 6-6,

Fig. 2;

gage a suitable hydraulic operating device I4.

The body II is provided with an upper slot I5 and a lower slot IG andthe end of the body remote from the threaded portion I3 is open to provide upper and lower jaws I1 and I8. The jaws I1 and I8 include square portions I 9'. During machining of the barrel I I- the portions I9 are left square to receive the nuts on bolts or pivot pins, to be later described. The jaws I1 and I8 are rabbeted as at I9. In the rabbets I9 I arrange opposed upper and lower shear blades 20 and 2| which are held in place as by screws 22. As shown in Fig. 8 the shear blades 20 and 2| have arcuate edges 23 and parallel opposed edges 24 and 25. The blades have sharpened cutting edges 26 and 21 which are adapted to sever the projecting mandrel portion of a mandrel extrusion rivet.

The jaws I1 and I8, due to their construction, are suiiiciently resilient so that they may be moved towards and from each other by means which I will now describe. The lower jaw I8 is provided with a pair of support pins 28 which serve as pivots for links 29` which, at their upper end, support a pin 3|). The pin 30 in turn supports an arm 3| which, at its forward end, is provided with a. bearing and adjusting screw 32. The lower end of the screw 32 engages the outer face of the upper jaw I1.

The end of the arm 3| remote from the bearing member 32 is provided with a roller 33 and the construction is such that whenever the roller and its arm is rocked outwardly the arm will rock about the pin 30 and through the member 32 will force the jaws I1 and I8 toward each other as seen in Fig. 3, so that the shear plates 20 and 2| will move towards each other to shear oi the surplus mandrel and end 34 of the rivet.

The rivet shank must rst be pulled to properly set the rivet before it is cut oii and to accomplish this pulling operation I mount a slide member in the bore I2 of the body I I. The slide member 35 has a threaded extremity 36 adapted to be engaged by the operating device I4 mentioned above. The

pull member has a slot 36a therein which forms flexible upper and lower jaws 31 and '38. The laws 31 and 38, at the end of the slide member remote from the threads 32, have teeth 39 which grip the shank 34 of the rivet for the purpose of pulling the same to its secured position.

In Order to cause the jaws 31 and 38 to approach each other to thereby cause the teeth 39 to grip the rivet shank, I show the upper jaw 31 as provided with spaced, downwardly depending .links 40 which are disposed one on each side of the lower :law 38. The links 40 support a pin 4| which pivotally supports an arm 42 which at its forward end has a bearing and adjusting `screw 43 which engages the lower jaw 3B. The end of the arm 42, remote from the bearing screw 43, has a roller 44 thereon.

The roller 44 engages a cam surface 45 on a plate 46 which is held on the body I l as by a. screw At the same time the arms 49 will be moved downwardly, thus pulling the upper jaw 31 downwardly so that the rivet shank is engaged by the teeth 39. As the pull member 35 moves rearwardly a cam surface 4S thereon engages the roller 33 and, rocks the arm 3l from the position shown in Fig.V t 2 to the position shown in Fig. 3. This actionjl causes the jaws il and I8 to move toward each" other and causes the shear plates VI9 and' 2U toV e Rollers 33 and 44 are So.`

sever the rivet shanks. disposed that the teeth 39 iirst engage the shank when the pull member starts its movement. Further movement of the pull member causes the shank of the rivet mandrelto be pulled into the hollow portion of the rivet whilefthe'shear plates '19 and 2i! bear against the rivet head.

At the time the pull member is approaching its extreme movement, the cam 48, by means of the roller 33, rocks the arm 3| and causes the shear plates to sever the shank. Thus it will be 'seen thatthe rst operation is to pull the rivet shank and the second operation i-s to cut off the pulled shank but both operations are performed by a single movement of the pull member.

The pull member threaded end 35 may be cou- V5. In a rivet working device, a body, said body having a, pair of movable jaws, opposed shear blades carried by said jaws, a slide member mounted in said body, adjustable means carried by one jaw and including a portion engaging the otherjaw and operable to move said blades towards each other, and means on the slide member actuating the blade moving means.

6.4 In a rivet Working device, a body having a `movable jaw, said body and jaw having opposed 'shear blades, a link on said body, an arm pivoted On said link, said link being disposed intermediate pled to an operating member which may be operi ated by hand, as by a lever system, shown in Fig. l, with a handle 59 operating a, piston'El in a cylinder 52 and With the body lliof the operating member engaging the threads i3 on the body previously mentioned. Y

The pull member illustrated is shown and claimed in my copending application Serial No. 542,391, filed June 27, 1944, now Patent Number 2,395,720, granted February 26, 19,46. Y

VI-Iaving thus described my invention, I claim: 1. In a rivet working device, a body,l a slide member mounted within said body, said slide member including a pair of jaws arranged in opposed relation, a link on one of said jaws, an arm mounted on said link, said arm engaging the other jaw, and means on said body for engaging said arm to rock the arm.

2. In a rivet working device, a body, a slide ,member mounted within said body, said Vslide member including d plurality of jaws, a link on one of said jaws, an arm mounted on said link, one end of said arm engaging another jaw, and means to move the other end of said arm.

3. VIn a rivet working device, a body, a slide member mounted within said body, said slide member including a, pair of jaws arrangedV in 'opposed relation, a link on one of said jaws, an arm mounted on said link, one end of saidV arm engaging the other jaw and a cam surface` on 'said body engaging the other end of said arm for rocking'the latter. m 4, In a rivet working device, a body, a slide membermounted in said body, said slide member including a pair of spring jaws, gripping prongs arranged in opposed relation on said jaws, a link on one of said jaws, an arm mounted on s aidlink,

one end of said arm having adjustable means thereon engaging the other springjaw, the ,other end of saidarm having a roller thereon, and a ycam surface on said body en'gageable iby Said roller.

the length of said body, means on said arm to iengage said jaw, a slide member mounted within saidbody, said slide member having a cam surblades carried by said jaws, a linken 'one of saidV jaws, an arm pivoted on said link, said link being disposed intermediate the length of said body, yone end of said arm being disposed to engage 'the other of said jaws, the other end iofsaid arm having a roller thereon,l a slidemember mounted within said body, said slide member having a vcam surface thereon adapted to engage `said .roller 'to rock said arm and thereby move said blades towards each other, 'said slide member including a pair of spring jaws, gripping prongs arranged in opposed rel'ationon said slide member jaws, a link on one of said slide member jaws, a slide member arm pivotally mounted on saieljlast men-k tioned link, one end of said slide member arm` engaging the other slide member jaw, 'the otherV end of saidV slide Vmember arm 'having a, roller there-on, and a cam surface on said body engageable by said roller and adapted to shift said slide member arm to move said'slide, member jaws towards each other, said last mentioned cam sur-Y face Abeing disposed to engage its associatedroller prior to the time thelrst mentioned roller is Vengaged by its cam surface.

8.. in a rivet working device, .9, body, said body having a pair of movable laws, opposed shear blades Carried by saidY Jaws, a link. 0n one 0f said jaws, an arm pivoted on said link., said'link being k Y disposed intermediate the lengthr of said body, one end of said arm being disposed to engage :the

other of said, jaws, a slidemember mounted within Y said slide member jaws, a flink on one of said slide member jaws, a slide member 'arm' pivotally Y mounted on said last Vmentioned, link, one end of said slide member .arm engaging the 'other slide member jaw, the other end-of said slide member Y arm havinga-roller thereon, a cam surface on 'the body Yengageable by the roller:andadaptedtorock said slide member arm to cause saidV last mentioned jawsto movetowards -each other, said roller being disposed to rock its Vassociated arm 5 6 prior to the time the first', mentioned cam surface Number Name Date rocks its associated arm. 847,980 Bowler Mar. 19, 1907 CONRAD R. BUCHET. 1,766,035 Nielsen June 24:, 1930 1,829,696 Wylie Si', al OC. 27, 1931 REFERENCES CITED 5 2,049,822 Polly Allg. 4, 1936 The followin references are of record 'n th 132,112 Huck Ot- 4 1933 me of this paint; 1 y e 2,216,767 Davitow oct. 8, 1940 UNITED STATES PATENTS /FOREIGN PATENTS 10 Number Country Date Nungm mcmf Febfems 371,817 Italy Aug. 5, 1939 511,885 Fraley Jan. 2, 1894 

